*Edit: I will begin deleting comments that are spreading misinformation. Your theory or anecdotes that getting lots of common blades of a certain element (like holding lots of Dark Blades to increase your chances of getting KOS-MOS) is incorrect. The amount of common blades you have does not affect your ability to summon a Rare Blade in any way.* How did you go making sense of all that? Have you checked to see which group you're in? 🙃

1:20 kos mos base probability 0.1 THAT EXPLAINS A LOT...

Blade summoning....Xenoblade's version of shiny hunting then...

After watching this video... my next core I opened was KOS-MOS cause of the tips you mentioned.... 800 rare cores and 200 legendary cores just to find out I was doing it wrong the whole time lmao... Thank you so much for the tips

This was more complicated than calculating all of the pokeball multipliers on a arceus

Just got real lucky, that while just after watching this video I finally got KOS-MOS. One thing that's nice NOW at least with the new cloud saves, I just farmed for 99 legendary cores, uploaded my save and turned off auto back up, popped all 99 cores and if I didn't get KOS-MOS, just redownload the save and try again. Took five rounds of this and I finally got her

While the numbers are interesting to know, it seems it does not help too much than just do what the in-game dialogues tell you: get high luck, use legendary crystals, level up ideas. I discovered recently, that there is even a dialogue that only the highest idea level is used (some Nopon in Argentum on some pipes where you have to jump down to.)

When kos-mos was the first rare blade you summoned on Zeke (off of a common crystal I might add)

I read the datamine stuff + the threads about it, but this video did such a great job of talking thru it + helping me understand it. Thank you so much!

Hey @JRPGGaming Thanks for this video. I finally got KOS-MOS last night after following some of the tips in the video (along with a lot of other YT channels and forums). I'm in Chapter 5 and just got to Fonsett so really glad I was able to get her this early so I can enjoy the game a bit more. I used about 100 or so common crystals (I seem to get a ton of them) and I opened maybe 20 rare ones (was trying to get some rare blades for Mòrag). I had been using +5 boosters and decided to just use 1 each time since you mentioned that the booster kind of trumps the rest of the attributes anyway. I was on my very last rare crystal and used my last Justice booster with Rex and KOS-MOS popped up. I was kind of shocked and really relieved that I was able to get her. Anyway, thanks again.

Excellent video. Over 50 hours of game time on XB2 and i was unaware of almost all of this. Makes so much sense now!

Thank you so much. Your method worked way better than the one I used(which was to keep any single element blade), I was able to get KOS-MOS today by using only Rare and Legendary Cores I didn’t even need a booster for her too.

This should have way more views. This is a great video. Thanks for walking through it.

This is one of the most annoying aspects in the game. It takes too long to open core crystals, just to get many duds in the process. The limits of max blades forces you to get rid of them too often, and there’s no way of filtering blades by their field actions. The most annoying part of blades, is how in order to use a field action, they must be in your party. It sucks to have to keep digging through your scrambled mess of blades, just to find if they have a certain value you need to open a chest or path. These end up feeling like a complete waste of time, and feel too pointless. If only the game didn’t have so many useless blades, or had a way of detecting that you have the necessary limit of blade abilities, it would save a lot of time from having to keep digging around for useless party members that you’ll just replace as soon as a puzzle is solved.

KOS-MOS the RNG queen. I spent 4 days and 3 nights trying to roll her. But she is mine and I always have her with me. Something about her being the only other light blade besides Mythra, and the fact that she is vocally acknowledged by herald... It makes her really stand out from the crowd... Despite having washed out colors. Edit: So, what I meant was; I was on winter break. I woke up at 6am, and spent 3 hours farming rare cores. Then 3 hours rolling blades (no cutscene skip) After rolling all blades, it's noon. I had lunch, then spent 3 more hours grinding legendaries, and 3 more after that rolling until 6pm. Doing this for 3 days straight, rolling 600 cores a day with no luck was such a soul crushing experience. I started low-key doubting she even existed. I was rolling cores obsessively like I was getting paid for it. I already summoned every single blade in the game. And 2,400 cores isn't even half the amount I'd spent getting all the other blades. I was trying to get her the entire game. But it wasn't until my 4-day obsession that she appeared.

+190 hours of game +1000 legendary, common and rare core crystals opened using Zeke with mayority of justice with a total of 890 of luck (using items and other blades)... AND STILL NO KOS MOS!!!

6-dimensional chess between 2 wicked deities.

Nice pick on the background music. Uematsu was on fire for 9.

Thanks for all the great Xenoblade videos Jay. It has made this game more enjoyable for me. Where do you get all these values in your spreadsheets?

I'm glad you made this video so people that didn't already know can see it, KZfaq being the biggest platform. I have 12 rare blades left besides the NG+ blades, but I'm probably just gonna start NG+ soon anyways.

Well, I'm off to a happy start on this video now knowing the base chance of the ONE blade I need. lol This is super useful stuff, thanks much for making this video!

thank you for all your research

Thanks, this is very useful information

THIS IS EYE OPENING. I now definitely know I was a group 2 in my first save and a group 4 in my second.

Im new to this game, ive bought it last week, and first time i've used legendary core i got Perceval from my first try, and i love him so far, thanks so much for this guide, i'm gonna take my time watching it and learn more from you, i love this game so far

Kos-Mos was my first rare blade. I love her

Love the FFIX music 😍 Thanks for sharing and big thanks to MooseHunter!

Loving the FF series music in your videos. Keep'em coming!

My first rare was Azami, and now that I think about it, I got Perceval and Adenine fairly early. The blade that gave me so much trouble to get was Zenobia, of all things!

Thanks to this video, i got Perdido, Sever and Finch!

Would love someone to figure out the statistics on the common blades now. Then the blade system has basically been cracked.

I think all my rare blades have been from common core crystals. I know most others have had the same "issue".

A lot of people are definitely going to put this information to good use. I'm use to dealing with random shenanigans when it comes to getting everything in a specific game so the aggravating aspect of this will be nothing new to me, but at least this information will be useful for those that want to get every blade in the game.

This is some really good info to know, especially about the pity system. I swear i must've gotten most of my rare blades from the pity point system so far XD Seriously though, I hope the devs decide to do an update on the algorithm cause it's really annoying going through all the rare cores, even a few legendary cores, and still only get the common blades...

Seems like I'm in group 3. My first 10 summoned rare blades in order (excluding specifics) are: Kora, Finch, Nim, Azami, Agate, Vale, Perceval, Gorg, Ursula, and Perun My other blades are: Godfrey and Newt

6:37 mine was the one with Finch Kora and Nim since Finch was my first rare anf kora was 9th, Nim could've been a regular pull since i got a little late. (Also KOS-MOS was my 12th rare so im pretty happy about) (KOS-MOS was before Nim btw)

I got KOS-MOS yesterday in chapter 4 during my first play through, happy to know I got lucky

I mostly relied on Boosters and rare/legendary crystals. I would NEVER be dumb enough to release a blade for 1 particular blade. Only time I use common cores is to release them for boosters. Boreas was my first blade and Zenobia was my last. In NG+, Akhos was my first and Obrona was my last.

I decided to get a bunch of common blades, in the first common crystal with no added things I got KOS-MOS, felt good :D

That’s info worth having thanks

I got my kos mos early in NG+ when I opened a few legendary crystals. Also got patroka around the same time.

Methinks in Group 2 then. Boreas was my very first Rare Blade and I remember getting Electra not much longer afterward.

Wow. I got KOS-MOS on my third core crystal with Morag. Had no idea she was that rare!

Kos-Mos was one of my first blades. I didn't even knew she was so rare.

0:02 No, got her yesterday thank you very much.

@0:00 No, I struggled to get Vale. Now I got everybody.

I know it's an old video but a,couple questions. Does it matter how much of an increase you get from the idea stat or does it just have to be the highest. For example if justice is already the highest should I still use boosters? Also does total idea level play into the draw?

It’s about time we found the algorithm thank you

Can you get herald again of you release her? I don't quite understand what you meant but it sounded like you said something along the lines of you can resummon blades from specific cores like wulfric?

5:14 I think I'm in Group 1, as I got Boreas, Godfrey, and Agate as rare Blades 2, 5, and 7 respectively, before completing any other pity Blade groups, but I might also be in Group 4, as I got Kora and Finch (rare blades 8 and 9 respectively) before Roc, and Nim was my next rare Blade (10th) pull after Roc. My other first ten rare Blades are Azami, Zenobia, Floren, and Vale, as the 1st, 3rd, 4th, and 5th respectively. However, it's also possible that I simply got and released a bunch of commons between Finch (who was the last rare before I got Roc) and Nim, and just don't remember it (in fact, it seems I've released all my commons from before I got Nim, excluding the tutorial one that the game forces me to keep and one fire Knuckle Claw common that I'm still working on the affinity chart for). I'm definitely not in the other groups, though, as I only recently got Gorg, Perun, and Perceval (in that order) *after* defeating the final boss, have so many commons between Gorg and the previous RNG Rare Blade I got before him, and I don't have Ursula yet. Given this info, do you think I'm Group 1 or Group 4? That said, the only rare Blades I'm missing, excluding NG+ Blades since I haven't started that yet (I want to finish as much as I can before starting NG+), are Ursula and KOS-MOS, the former having high base rate in both groups and the latter being consistent across all groups. Edit: I got Ursula, so now I only need KOS-MOS.

I... feel really bad now, since Kos-Mos was my first blade i got from a rare. i sincerely apologize to you guys.

This is truly amazing. Thank you for this video. Now I know that I am not in group 2 so that's why zenobia is so hard to freaking get for me...ugh. Why the hell are her and kosmos so impossible to get.

I'm so glad to actually know the math behind this now.

I got KOS-MOS literally seconds after finishing the video

Used 15 rare cores last night and got 4 rare blades including Kos-mos!

My first 10 rare blades are: Azami, Finch, Dahlia, Floren, Boreas, Ursula, Adenine, Perceval, T-elos, and Godfrey. The rest I unlocked after are: Kora, Nim, Perun, Electra, Newt, Gorg, Zenobia, and Agate. I only got Wulfric, Vess, Kassandra, Corvin, Crossette, Praxis, Theory, Herald, and Sheba from main story/side quests/DLC. The only two blades left that I still need to get are Dagas and KOS-MOS.

i got KOS-MOS so out of blue that i had no idea that people were struggling with it! ironically i'm having lots of troubles to get some of the most common rare blades instead :D

just got kos mos this morning... on my new game... 5 minutes after getting the ability to open cores lol, my 4th rare blade. i was speechless when looking at the screen after having tried to get her for 200 hours on my other profile

I think i got KOS-MOS out of a commom core with 5 compassion boosters on Zeke. His idea value for it was the highest too.

Ok so right now (as im typing) im currently at the stage of the game where im up against Malos and Akhos on hte Urayan Titan. I have attempted 7 blades so far, 4 of which are the generic blades, 3 of which are the rare blades. the blades i summoned are: Adenine, Ursula, and Electra in that order. So going based on the % chance of summoning: I'm most likely in group 1. As that group holds the highest percentage chance among all 3 of those blades.

KOS - MOS was my first rare blade I got! Ididn't knew she is so rare. I'm super lucky

Quick question, assuming the blades put into the pool are based on the silhouettes in view the summoning, I Have Seen many of the NG+ blades while trying to grind for them in the pool, but never getting them, and Yes i use rare crystals, so explanation?

Hold up, 1 more question With this new info, we can confirm that stacking up on dark blades to "thin out the blade pool" in hopes of getting kosmos DOES NOT WORK. Correct?

I already have KOS-MOS. I got her by giving Zeke one of the luck bands (I forget which) and maxed out his Justice Idea to lvl 10 whilst the others were around 4-6 with a Legendary Core Crystal. I already had Percival on Morag and I think I already had Azami on Zeke. I guess I got lucky?

I think my main save is in Group 5 based on this, since Vale was the first Rare Blade I got in that save, and she was shortly followed by Ursula and then Floren. Of course, now, I only have 3 Rare Blades left to summon prior to beginning NG+, those being Zenobia, Dahlia, and the ever-elusive KOS-MOS. Now, I can't confirm this with any certainty (this is just a baseless theory on my part, this is just what things seemed like in *my* case specifically), but to me, it seems like if you watch the summon animation without using any Boosters, if you see the outline of a given Rare Blade but don't actually get them, that may still be the Rare Blade you will get next (or, if more than one Rare Blade's silhouette appears, one of those will be the next Rare Blade you get). This has seemed to hold true for me, as on several instances I saw only Newt's silhouette, and Newt turned out to be the next Rare Blade that I eventually summoned. The same also happened with Dagas & Finch for me, and following that same pattern, I expect that my next Rare Blade will be Zenobia, as her silhouette has been regularly appearing for me without her actually being summoned just yet, and during that time period I have no seen Dahlia's or KOS-MOS' silhouettes appear at all.

Kos-MOs was my first blade and I had no idea she was rare af

I have Godfrey and Kore, meaning a was able to get one outside of my pity timer catagory. But dose the timer reset or can you run out of luck after drawing 3 rare blades?

Question equiping luck accessories on parties boost can summon a last rare blade? I am i trying to summon to zenobia and used up 200 legend cores still no luck my third attempt is to level up the idea of my driver to maximum and add idea booster while summoning.

KOS-MOS was the first Blade I pulled with Zeke... I just got into XBC2, so I didn’t think anything of it. NG+ and im looking up videos on stuff to do, and appearently it’s like a really hard thing to get her XP

I pulled Kos-Mos on Rex pretty early on (during chapter 4) from a Common Core. Guess that was absurdly lucky.

I am curious on something on the pity timer and the group. I am doing my first run through of the game and with Rex I have literally summoned Floren, Adenine, Ursula, Perun, Finch, Gorg, Perceval, and Azami using Common, Rare, and a couple of DLC legendary cores and with Nia, I summoned Dagas and Boreas. My first summon after two legendary cores was Ursula so that would make me in group 5, right? Outside getting Floren as my second rare blade, I could simply chalk the rest as to having a good stroke of luck?

I got KOS-MOS from a common core crystal with 3 boosters (can't remember which boosters I used ). I wasn't trying to get her it just happened randomly. I wish I had video evidence. I would have filmed it if I knew how rare she was.

I got really lucky and got KOS-MOS as my 2nd rare blade

I admire your work and dedication on making sense of the algorithm but I’m still confused lolol

Does NG+ affect your blade grouping. Like for example if I was in group 3 on my initial save would i stay in group 3 on NG+ or would I be reassigned to a new group. Im asking because I recieved Agate on my first rare blade in my first playthrough and went to NG+ without collecting all blades prior because I still wanted to be consistently receiving rare blades from rare and legend cores (side note my 3rd rare blade was kos mos and i didnt understand how rare it was untill seeing these videos now im glad i got so lucky.) Now that im in NG+ my first rare blade I recieved was Dahlia. Im just curious as this could have rammifications to you if youre struggling to get a few rare blades that have low stats on your group in one save and procede to NG+ to get better odds

5:45 One thing I never understood about point systems where the lowest number of points you can get at one time is more than one: if the all the point values you can get at one time are even multiples of the lowest, then why not just divide all of them by the lowest value? For example, with this pity Blade system, on paper, it's 5, 25, and 50, but it's basically just 1, 5, and 10.

I'm in group 2 for sure. Summoned them in same damn order too.

Oh wow, i got kos-mos immediately right when I opened this video again....

Rally I just got kos mos and I just started

I used a few (maybe 5?) common cores pretty early and got common blades. As soon as I got 2 rare cores i used them and got Perun and Electra. Does that most likely put me at group 3?

I got kos-mos by using only common core crystals and boosters to raise the level was one point higher. It took 200 crystals. I used a luck item that was equipped. I also got Zenobia via the same strategy. That took 150 common crystals. I also found that switching from both common and rare crystals using the above strategy allowed me to get the rest of the 5 star blades.

I have KOS-MOS, but I'm missing Perdido. I'm trying to give him to Rex since he doesn't have a Torna Blade, but it's late in the game so he's now a Master Driver. This all just reaffirms what I read on a wiki a while back. Just wanna be sure I only need one Bravery Booster.

After coming back after not playing since I beat the game a few months ago, I did some more grinding for rare and legendary core crystals from one boss, and I finally got her after opening only about another 100 rare core crystals and 20 legendary core crystals! Of course I get it from a rare core crystal without any boosters while not even at max luck! Haha! I'm so happy right now! I can finally move on to new game plus!

I just watch your old one and then you uploaded this...

I got kos mos in a common core around the world tree cause I was grinding to max common and rare cause I wasn't high enough to kill enemies that drop legendary cores easily. And I had no idea how rare she was

*KOS-MOS,* huh? She was my, like, *5th Rare Blade?* Apparently, that makes me an anomaly. Cool. (⌐■_■)

When you get kos-mos on accident without even knowing she existed

I got super lucky. Kos-mos was like the 5th or 6th blade I awakened.

Funny that this video came out the day after I finished getting all the blades.

So, the only two Blades I'm missing are Zenobia and KOS-MOS (before New Game+), and I just unlocked Perceval last night. How many Crystals will I have to open before I get Pity Bladed?

Effectively, the 15 Rare Core Crystals via DLC-pack allow you to go through all 3 pity blades, or rather: guarantee 3 rare blades.

I think I'm in Group 2... First blade was Azami... Missing Gorg, Newt, Zenobia, KOS, & Dehlia. I summoned everything else before hitting the Common blade limit from having my Merc rank at level 4. I'm either going to start getting rid of some of my commons or just wait until my Merc rank hits 5 as I still need to grind out some Legendary cores.

Technically, Kos-Mos is the rarest Blade. Since she isnt from the XC2 universe and is actually from the Xenosaga universe, the Zohar probably threw her through space and time for her to show up here.

got she yesterday ;3

I got Kos-Mos during new game plus you know how mad I was

I summoned Kos-Mos and T-Elos one after the other x.x

I got KOS-MOS after three legendary core crystal rolls earlier on in the game

This is very interesting so I only have electra left to summon to have all the rare blades

I got Kosmos before i even beat the game, so glad after learning how rare she is

Kosmos was like my third rare Blade xD